JP2020067035A - Electric oil pump - Google Patents

Abstract

To provide an electric oil pump 1 capable of performing works such as inspecting an electronic substrate to a bottom surface of a cover portion 103 in the electronic substrate 101, fixing components to the electronic substrate, and screwing to the electronic substrate without separating the electronic substrate 101 from the cover portion 103.SOLUTION: An invertor 100 includes a cover portion 103 housing an electronic substrate, and covering a motor in a motor housing 14. The cover portion 103 includes a first opening and a second opening opposed to the electronic substrate housed in the cover portion 103, a first closing member 103e for closing the first opening, and a second closing member 103f for closing the second opening, on a bottom portion 103a.SELECTED DRAWING: Figure 14

Description

  The present invention relates to an electric oil pump.

  Conventionally, an electric oil pump including a pump unit, a motor unit that drives the pump unit, and an inverter that controls driving of the motor unit is known.

  For example, the electric oil pump described in Patent Document 1 includes a pump unit, a motor housing unit as a motor unit that drives the pump unit, and a control unit as an inverter. The electric motor housing portion drives the pump portion by a motor housed in the housing. The control unit includes an electronic board and a case that houses the electronic board. The electronic board includes an inverter circuit.

JP, 2016-151243, A

  In the electric oil pump described in Patent Document 1, in order for an operator to work on the surface of the electronic board fixed to the case facing the bottom surface of the case, the electronic board must be removed from the case, which is troublesome. There is a problem of cost.

  Therefore, an object of the present invention is to provide an electric oil pump capable of performing work on a surface of an electronic board facing the bottom surface of the member without removing the electronic board from a member that houses the electronic board, such as a case. Is to provide.

  An exemplary first invention of the present application includes a pump unit, a motor unit that drives the pump unit, and an inverter that controls driving of the motor unit, and the motor unit includes a housing that houses the motor. The inverter is an electric oil pump including an electronic board, the inverter includes a cover section that houses the electronic board and covers a motor in the housing, and the cover section is housed in the cover section. The electric oil pump is provided with an opening facing the electronic substrate and a closing member that closes the opening.

  According to the exemplary first invention of the present application, it is possible to perform work on the surface of the electronic substrate that faces the bottom surface of the cover portion without removing the electronic substrate from the cover portion that houses the electronic substrate.

It is a fracture | rupture perspective view which fractures | ruptures and shows the electric oil pump which concerns on embodiment. It is a perspective view which shows the motor housing in the electric oil pump, and a part except a pump housing. It is a perspective view showing the appearance of the electric oil pump. It is a perspective view showing the electric oil pump of the state where an inverter was removed. It is an expansion perspective view of the terminal block provided in the same motor housing. It is a perspective view showing the same inverter in a state where an electronic substrate is not assembled. It is a perspective view which shows the same inverter in the state with which the electronic substrate was assembled. It is sectional drawing which shows the same electronic substrate and the lead provided in a cover part. FIG. 3 is a plan view showing the electric oil pump with the cover attached to the motor housing, as seen from the cover side. It is a top view which expands and shows the peripheral part of the 1st opening in the same cover part attached to the same motor housing. It is a perspective view which shows the axial end part of the same cover part attached to the same motor housing from the inside of a cover part with some components provided in the same motor housing. It is a perspective view which shows the axial end part of the same cover part attached to the same motor housing from the outside of the cover part. It is a perspective view which shows the axial end part of the same cover part in the state where the first opening was closed from the outside of the cover part. It is a top view showing the electric oil pump in the state where the 1st opening and the 2nd opening of the cover part were closed. It is a front view which shows the terminal block and electric board of the electric oil pump which concerns on a modification.

  Hereinafter, an electric oil pump according to an embodiment of the present invention will be described with reference to the drawings. In the present embodiment, an electric oil pump that supplies oil to a transmission mounted on a vehicle such as an automobile will be described. Moreover, in the following drawings, in order to make each structure easy to understand, the scale and the number of each structure may be different from the actual structure.

  Further, in the drawings, an XYZ coordinate system is appropriately shown as a three-dimensional orthogonal coordinate system. In the XYZ coordinate system, the Z-axis direction is parallel to the axial direction of the central axis J shown in FIG. The central axis J is a central axis line of a shaft (motor shaft) 13 of the motor unit 10 described later. The Y-axis direction is parallel to the lateral direction of the electric oil pump shown in FIG. The X-axis direction is a direction orthogonal to both the Y-axis direction and the Z-axis direction.

  In the following description, the positive side (+ Z side) in the Z-axis direction will be referred to as the “rear side”, and the negative side (−Z side) in the Z-axis direction will be referred to as the “front side”. In addition, the rear side and the front side are names used merely for the purpose of description and do not limit the actual positional relationship and direction. Further, unless otherwise specified, the direction parallel to the central axis J (Z-axis direction) is simply referred to as “axial direction”, the radial direction around the central axis J is simply referred to as “radial direction”, and the central axis J The circumferential direction centered at, that is, the circumference of the central axis J (θ direction) is simply referred to as the “circumferential direction”.

  In the present specification, the term “extends in the axial direction” means, in addition to the case of strictly extending in the axial direction (Z-axis direction), the case of extending in a direction inclined by less than 45 ° with respect to the axial direction. Including. In addition, in the present specification, the phrase “extends in the radial direction” means that the term strictly extends in the radial direction, that is, the direction perpendicular to the axial direction (Z-axis direction), and in addition to the radial direction, 45 ° It also includes the case of extending in an inclined direction within the range of less than.

[Embodiment]
<Overall structure>
FIG. 1 is a perspective view showing an electric oil pump according to an embodiment, partially broken away. As shown in FIG. 1, the electric oil pump 1 according to the embodiment includes a motor unit 10, a pump unit 40, and an inverter 100. The motor unit 10 includes a shaft 13 arranged along a central axis J extending in the axial direction. The pump unit 40 is located on one axial side (rear side) of the motor unit 10 and is driven by the motor unit 10 via the shaft 13 to discharge oil. The inverter 100 is arranged on the + X side of the motor unit 10 and controls the drive of the motor unit 10.

<Motor part 10>
As shown in FIG. 1, the motor section 10 includes a shaft 13, a rotor 20, a stator 22, a motor housing 14, and a coil 22b.

  The motor unit 10 is, for example, an inner rotor type motor, in which the rotor 20 is fixed to the outer peripheral surface of the shaft 13 and the stator 22 is arranged radially outside the rotor 20. The rotor 20 is fixed to the other axial side (front side) of the shaft 13. The stator 22 is arranged to face the rotor 20.

<Pump section 40>
As shown in FIG. 1, the pump unit 40 includes a pump rotor 47 and a pump housing 51.

(Pump rotor 47)
The pump rotor 47 is attached to the rear side of the shaft 13, as shown in FIG. The pump rotor 47 includes an inner rotor 47a and an outer rotor 47b. The inner rotor 47a is fixed to the shaft 13. The outer rotor 47b surrounds the radially outer side of the inner rotor 47a.

  The inner rotor 47a has an annular shape. The inner rotor 47a is a gear having teeth on its radially outer surface. The inner rotor 47a rotates together with the shaft 13 around the axis (θ direction). In FIG. 1, a part of the outer rotor 47b is not shown in order to show a fractured surface of the outer rotor 47b. The outer rotor 47b is an annular shape that surrounds the outer side of the inner rotor 47a in the radial direction. The outer rotor 47b is a gear having teeth on its radially inner surface. The outer radial surface of the outer rotor 47b is circular.

  The gear on the radially outer side of the inner rotor 47a and the gear on the radially inner side of the outer rotor 47b mesh with each other, and the inner rotor 47a rotates as the shaft 13 rotates, whereby the outer rotor 47b rotates. That is, the rotation of the shaft 13 causes the pump rotor 47 to rotate. The motor unit 10 and the pump unit 40 are provided with a shaft 13 as a rotating shaft made of the same member. This can prevent the electric oil pump 1 from increasing in size in the axial direction.

  Further, as the inner rotor 47a and the outer rotor 47b rotate, the volume between the meshing portions of the inner rotor 47a and the outer rotor 47b changes. The region where the volume decreases is the pressurizing region, and the region where the volume increases is the negative pressure region.

(Pump cover 52)
The pump housing 51 has an opening at the rear end in the Z-axis direction. This opening is closed by the pump cover 52. The pump cover 52 is fixed to the pump housing 51 with bolts 53.

(housing)
The motor housing 14 of the motor unit 10 and the pump housing 51 of the pump unit 40 are parts of a single member. The motor housing 14 and the pump housing 51 are cast products made of metal (for example, aluminum).

  The rotor accommodating portion of the pump portion 40 that accommodates the pump rotor 47 and the motor housing 14 of the motor portion 10 may be a single member portion or separate members. Further, the motor housing 14 of the motor unit 10 and the pump housing 51 of the pump unit 40 may be separate bodies.

  When the motor housing 14 and the pump housing 51 are portions of a single member like the electric oil pump 1 according to the embodiment, the boundary between the motor housing 14 and the pump housing 51 in the Z-axis direction is as follows. Is defined as That is, the center in the Z-axis direction of the wall provided with the through hole that penetrates the shaft 13 from the inside of the motor housing 14 toward the rotor housing portion of the pump housing 51 is the boundary in the Z-axis direction of both housings.

<Inverter 100>
The inverter 100 includes an electronic board 101. The electronic board 101 includes a plurality of electronic components 101b and a board 101a on which the plurality of electronic components 101b are mounted.

  FIG. 2 is a perspective view showing a portion of the electric oil pump 1 excluding the motor housing 14 and the pump housing 51. The motor 11 shown in FIG. 2 is housed inside the motor housing 14 shown in FIG. Inside the motor cover 12 of the motor 11, the rotor 20, the stator 22, the shaft 13 and the like shown in FIG. 1 are arranged.

  The inverter 100 includes a connector 102 connected to an external connector connected to a power source, as shown in FIG.

  FIG. 3 is a perspective view showing the appearance of the electric oil pump 1. A plurality of cooling fins 60 are provided at the end of the motor housing 14 of the electric oil pump 1 in the + Y axis direction.

  A first mounting surface 23, a second mounting surface 25, a first knock pin hole 18, a first bolt hole 19, and a suction port 16 are provided on an end surface (hereinafter referred to as a side surface) of the motor housing 14 in the −Y axis direction. . The first mounting surface 23 and the second mounting surface 25 are mounting surfaces for a transmission that is a mounted body to which the electric oil pump 1 is mounted. The suction port 16 is an opening for sucking the oil sent from the transmission into the pump portion 40.

  The first mounting surface 23 is provided with a first bolt hole 19 and a first knock pin hole 18. The first bolt hole 19 is a hole through which a bolt screwed into a female screw provided in the transmission is inserted. The first knock pin hole 18 is a hole into which the positioning first knock pin provided in the transmission is fitted.

  A third mounting surface 58, a third bolt hole 57, a second knock pin hole 56, and a discharge port 54 are provided on an end surface (hereinafter referred to as a side surface) of the pump housing 51 in the −Y axis direction. The discharge port 54 is an opening for discharging the oil in the pump unit 40 toward the transmission.

  The second mounting surface 25 is provided with a second bolt hole 24. The third mounting surface 58 is provided with a third bolt hole 57 and a second knock pin hole 56. The first knock pin of the transmission is fitted into the first knock pin hole 18, and the second knock pin of the transmission is fitted into the second knock pin hole 56, whereby the electric oil pump 1 is positioned with respect to the transmission. The electric oil pump 1 thus positioned is fixed to the transmission by the bolts inserted through the first bolt hole 19, the second bolt hole 24, and the third bolt hole 57, respectively.

  FIG. 4 is a perspective view showing the electric oil pump 1 with the inverter (100) removed. A terminal block 29 is arranged in the motor housing 14. The motor 11 housed in the motor housing 14 includes three cables 28U, 28V, 28W. In addition, U, V, and W added to the end of the reference numerals indicate members for U phase, V phase, and W phase. Hereinafter, U, V, and W described in the drawings are merely examples, and do not specify the positions of the U-phase, V-phase, and W-phase members.

  FIG. 5 is an enlarged perspective view of the terminal block 29. The terminal block 29 includes a resin base member 39, three square nuts 30U, 30V, 30W, and three housing side terminals 31U, 31V, 31W. The base member 39 includes three rectangular columnar recesses. Square nuts 30U, 30V, 30W are individually housed in these recesses. Housing-side terminals 31U, 31V, 31W having circular openings are stacked on the surfaces of the square nuts 30U, 30V, 30W. The female screw portions of the square nuts 30U, 30V, 30W and the circular openings of the housing side terminals 31U, 31V, 31W communicate with each other. The ends of the cables 28U, 28V, 28W are exposed copper wires and are crimped to the legs of the housing-side terminals 31U, 31V, 31W. By this caulking, the U-phase, V-phase, and W-phase coils of the motor 11 are electrically connected to the housing-side terminals 31U, 31V, 31W.

  FIG. 6 is a perspective view showing the inverter 100 in a state where the electronic board (101) is not assembled. The inverter 100 includes a resin cover 103. The bottomed cover portion 103 is provided with four leads 104 of the connector 102 for ground, U-phase, V-phase, and W-phase. A first opening 103b and a second opening 103c are provided on the bottom 103a of the cover 103. As shown in FIG. 1, the cover portion 103 covers the motor 11 housed in the motor housing 14.

  FIG. 7 is a perspective view showing the inverter 100 in a state where the electronic board 101 is assembled. Various electronic components 101b and three board-side terminals 105U, 105V, 105W are mounted on the electronic board 101. The electronic substrate 101 is fixed in the cover portion 103 by screwing. One surface of the electronic substrate 101 fixed to the cover portion 103 faces the surface (bottom surface) of the bottom portion 103a of the cover portion 103. As shown in FIG. 7, the cover portion 103 accommodates the electronic substrate 101 inside.

  FIG. 8 is a sectional view showing the electronic substrate 101 and the leads 104. The electronic substrate 101 has a through hole 101c. When the electronic substrate 101 is fixed in the cover portion 103 as shown in FIG. 7, the leads 104 penetrate the through holes 101c of the electronic substrate 101 as shown in FIG. The lead 104 is soldered to the electronic substrate 101 while penetrating the through hole 101c. This soldering is performed from both surfaces of the electronic substrate 101, which is the surface not facing the bottom 103a of the cover 103. Hereinafter, that surface is referred to as a “solder side surface”.

  FIG. 9 is a plan view showing the electric oil pump 1 in which the cover portion 103 of the inverter 100 is attached to the motor housing 14 from the cover portion 103 side. The cover portion 103 of the inverter 100 is screwed to the motor housing 14 as shown in FIG. 9. The second opening 103c provided in the bottom portion 103a of the cover portion 103 faces the surface of the electronic substrate 101 opposite to the bottom surface of the cover portion 103. In addition, the second opening 103c faces the lead 104 on the facing surface described above.

  FIG. 10 is an enlarged plan view showing a peripheral portion of the first opening 103b in the cover portion 103 attached to the motor housing 14. The electronic substrate 101 is provided with three through holes 101d. The first opening 103b provided in the bottom 103a of the cover 103 faces the board-side terminals 105U, 105V, 105W mounted on the electronic board 101 through the three through holes 101d.

  The board-side terminals 105U, 105V, 105W shown in FIG. 10 are in a state of overlapping with the housing-side terminals (31U, 31V, 31W) existing behind the board-side terminals 105U, 105V, 105W in FIG. Further, the housing side terminals (31U, 31V, 31W) are in a state of being overlapped with the square nuts (30U, 30V, 30W) existing on the back side of the housing side terminals (31U, 31V, 31W) in FIG. 10. The female screw of the square nut (30U, 30V, 30W), the circular opening of the housing side terminal (31U, 31V, 31W) and the opening of the board side terminal 105U, 105V, 105W communicate with each other.

  FIG. 11 is a perspective view showing the axial end portion of the cover portion 103 attached to the motor housing 14 from the inside of the cover portion 103 together with some components provided in the motor housing 14. In the U phase, the housing-side terminal 31U and the board-side terminal 105U are sandwiched between the square nut 30U and the head of the male screw 106U screwed into the square nut 30U. Due to this sandwiching, the housing-side terminal 31U and the board-side terminal 105U are electrically connected. Similarly, in the V phase and the W phase, the housing side terminals 31V and 31W and the board side terminals 105V and 105W are electrically connected.

  The through hole 101d provided in the electronic substrate 101 has a larger diameter than the heads of the male screws 106U, 106V, 106W. Therefore, the heads of the male screws 106U, 106V, 106W can penetrate the through hole 101d.

  FIG. 12 is a perspective view showing the axial end portion of the cover portion 103 attached to the motor housing 14 from the outside of the cover portion 103. A recess 103d is provided on the bottom 103a of the cover 103. The first opening 103b is provided in the recess 103d. A first closing member, which will be described later, is inserted into the recess 103d.

  FIG. 13 is a perspective view showing the axial end portion of the cover portion in the state where the first opening (103b) is closed from the outside of the cover portion 103. The first closing member 103e put in the recess (103d in FIG. 12) is welded to the recess and closes the first opening (103b).

  FIG. 14 is a plan view showing the electric oil pump 1 in a state where the two openings (103b, 103c) of the cover portion 103 are closed. The second opening 103c shown in FIG. 6 is closed by the second closing member 103f, as shown in FIG. Similarly to the first closing member 103e, the second closing member 103f is put into a recess provided in the bottom portion 103a and welded. Each of the first closing member 103e and the second closing member 103f is made of a resin having higher light transmittance than the cover portion 103.

  FIG. 15 is a front view showing the terminal block 29 and the electronic board 101 of the electric oil pump 1 according to the modification. The terminal block 29 is provided with six concave rail portions 29a. The U-phase housing-side terminal 31U is inserted into the terminal block 29 in a direction orthogonal to the paper surface of FIG. 15 with both ends in the lateral direction inserted in the concave rail portion 29a. The V-phase and W-phase housing side terminals 31V and 31W are similarly inserted into the terminal block 29. The housing side terminals 31U, 31V, 31W temporarily fixed to the terminal block 29 by inserting the terminal blocks together with the board side terminals 105U, 105V, 105W by screwing the male screws 106U, 106V, 106W into the square nuts 30U, 30V, 30W. It is fixed at 29.

<Operation and effect of electric oil pump 1>
(1) The electric oil pump 1 includes a pump unit 40, a motor unit 10 that drives the pump unit 40, and an inverter 100 that controls driving of the motor unit 10. The motor unit 10 includes a motor housing 14 that houses a motor 11. The inverter 100 includes an electronic board 101 and a cover portion 103 that houses the electronic board 101 and covers the motor 11 in the motor housing 14. The cover portion 103 closes the first opening 103b and the second opening 103c that face the electronic substrate 101 housed in the cover portion 103, the first closing member 103e that closes the first opening 103b, and the second opening 103c. The bottom portion 103 is provided with the second closing member 103f.

  According to the electric oil pump 1 having such a configuration, the member that accommodates the electronic board 101 of the inverter 100 is also used as the cover portion 103 that covers the motor 11 in the motor housing 14, so that the electric oil pump 1 can be downsized and reduced. Cost can be reduced. In addition, in the electric oil pump 1 having the above-described configuration, the operator can use the first opening 103b and the second opening 103c provided in the bottom portion 103a of the cover portion 103 to operate the bottom portion of the electronic substrate 101 housed in the cover portion 103. Work can be performed on the surface facing the 103a. Therefore, the operator can work on the surface of the electronic substrate 101 facing the bottom surface of the cover portion 103 without removing the electronic substrate 101 from the cover portion 103a. Examples of the work include a work for checking the state of the electronic board 101, a work for fixing a component to the electronic board 101, and a work for tightening a screw on the electronic board 101.

(2) In the electric oil pump 1, the electronic board includes the through holes 101c for soldering. The cover portion 103 includes a lead 104 penetrating the through hole 101c. The leads are soldered to the through holes 101c. The second opening 103c faces the lead 104 on the surface of the electronic substrate 101 that faces the bottom portion 103a of the cover portion 103 on both sides.

  According to the electric oil pump 1 having such a configuration, the operator performs the confirmation work of the electronic substrate 101 through the second opening 103c provided in the bottom portion 103a of the cover portion 103 without removing the electronic substrate 101 from the cover portion 103. be able to. This confirmation operation is an operation of confirming the soldering state of the through hole 101c and the lead 104 on the surface of the electronic substrate 101 that is accommodated in the cover portion 103 and that faces the bottom portion 103a.

(3) In the electric oil pump 1, the cover portion 103 includes the connector 102 for receiving power, and the lead 104 soldered to the through hole 101c is the lead 104 of the connector 102. According to the electric oil pump 1 having such a configuration, the operator performs the confirmation work of the electronic substrate 101 through the second opening 103c provided in the bottom portion 103a of the cover portion 103 without removing the electronic substrate 101 from the cover portion 103. be able to. This confirmation work is performed by checking the soldered state of the through hole 101c and the lead 104 of the connector 102 on the surface (opposite to the soldering side surface) of the electronic substrate 101 which is housed in the cover portion 103 and which faces the bottom portion 103a. This is a confirmation work.

(4) In the electric oil pump 1, the motor housing 14 includes the square nuts 30U, 30V, 30W as female threads and the housing side terminals 31U overlapping the square nuts 30U, 30V, 30W in the thickness direction of the electronic substrate 101. , 31V, 31W. The electronic board 101 includes board-side terminals 105U, 105V, 105W which are superposed on the housing-side terminals 31U, 31V, 31W in the board thickness direction. Further, the electronic board 101 includes three through holes 101d having a diameter larger than that of the heads of the male screws 106U, 106V, 106W screwed into the female screw portions of the square nuts 30U, 30V, 30W. The three through holes 101d face the square nuts 30U, 30V, 30W, the housing-side terminals 31U, 31V, 31W and the board-side terminals 105U, 105V, 105W that overlap each other. The first opening 103b provided in the bottom 103a of the cover 103 faces the three through holes 101d provided in the electronic substrate 101. According to the electric oil pump 1 having such a configuration, the operator does not remove the electronic substrate 101 from the cover portion 103, and the first opening 103b provided in the bottom portion 103a and the electronic substrate 101 housed in the cover portion 103 are not removed. The fixing work can be performed through the through hole 101d. This fixing operation is an operation of fixing the board-side terminals 105U, 105V, 105W and the housing-side terminals 31U, 31V, 31W to the terminal block 29 by screwing.

(5) In the electric oil pump 1, three terminals (31U, 31V, 31W, 30U, 30V, 30W) of the housing side terminal and the square nut are provided in the motor housing 14, and the U phase of the three-phase power supply, The V phase and the W phase are individually electrically connected. Three board-side terminals (105U, 105V, 105W) are provided on the electronic board 101 and are individually electrically connected to the U-phase, V-phase, and W-phase. Three through-holes 101d are provided in the electronic board 101 and individually face the three board-side terminals (105U, 105V, 105W). According to the electric oil pump 1 having such a configuration, the operator does not remove the electronic substrate 101 from the cover portion 103 for the U phase, the V phase, and the W phase, and the first opening 103b provided in the bottom portion 103a and the cover portion. The fixing work can be performed through the through hole 101d of the electronic substrate 101 housed in the 103. This fixing operation is an operation of fixing the board-side terminals 105U, 105V, 105W and the housing-side terminals 31U, 31V, 31W to the terminal block 29 by screwing.

(6) In the electric oil pump 1, each of the cover portion 103, the first closing member 103e, and the second closing member 103f is made of resin, and the first closing member 103e and the second closing member 103f include the cover portion. It is welded to the bottom portion 103a of 103. In such a configuration, the sealability between the first closing member 103e and the bottom portion 103a is improved as compared with the configuration in which the first closing member 103e and the second closing member 103f are fixed to the bottom portion 103a by screwing. Therefore, according to the electric oil pump 1, compared with the structure in which the first closing member 103e and the second closing member 103f are fixed to the bottom portion 103a by screwing, the electric oil pump 1 is more waterproof and oilproof. be able to.

  The first closing member 103e and the second closing member 103f may be fixed to the bottom portion 103a by adhesion. Also in such a configuration, the waterproofness and oilproofness of the electric oil pump 1 can be enhanced as compared with the configuration in which the first closing member 103e and the second closing member 103f are fixed to the bottom portion 103a by screwing.

(7) In the electric oil pump 1, each of the first closing member 103e and the second closing member 103f is made of a resin having higher light transmittance than the bottom portion 103a, and is welded to the bottom portion 103a. In such a configuration, it is possible to irradiate the laser beam onto the peripheral portion of the first opening 103b of the bottom portion 103a through the first closing member 103e that is overlapped with the peripheral portion (recessed portion) of the first opening 103b of the bottom portion 103a. . By such laser irradiation, the first closing member 103e is welded to the bottom portion 103a. The second closing member 103f is also welded to the bottom portion 103a by the same laser irradiation. In such welding, the first closing member 103e and the bottom portion 103a are firmly welded without any gap. Similarly, the second closing member 103f is also firmly welded without a gap. Therefore, according to the electric oil pump 1, the waterproofness and the oilproofness of the electric oil pump 1 can be improved as compared with the configuration in which the first closing member 103e and the second closing member 103f are bonded to the bottom portion 103a. .

  Although the preferred embodiments of the present invention have been described above, the present invention is not limited to these embodiments, and various modifications and changes can be made within the scope of the gist thereof. These embodiments and the modifications thereof are included in the scope and gist of the invention, and at the same time, included in the claimed name and its equivalent range.

1: Electric oil pump 10: Motor part 11: Motor 12: Motor cover 13: Shaft (motor shaft)
14: Motor housing 16: Suction port 18: First knock pin hole 19: First bolt hole 20: Rotor 22: Stator 23: First mounting surface 24: Second bolt hole 25: Second mounting surface 28: Discharge port 29: Terminal block 30U, 30V, 30W: Square nut 31U, 31V, 31W: Housing side terminal 39: Base member 40: Pump part 47: Pump rotor 47a: Inner rotor 47b: Outer rotor 51: Pump housing 52: Pump cover 53: Bolt 54: Discharge port 56: Second knock pin hole 57: Third bolt hole 58: Third mounting surface 100: Inverter 101: Electronic board 101a: Board 101b: Electronic component 101c: Through hole 101d: Through hole 102: Connector 103: Cover Part 103a: Bottom part 103b: First opening 1 3c: the second opening 103d: recess 103e: first closing member 103f: second closing member 104: Lead 105U, 105V, 105W: substrate terminals 106U, 106V, 106W: external thread J: central axis

Claims (7)

A pump unit, a motor unit that drives the pump unit, and an inverter that controls the driving of the motor unit,
The motor unit includes a housing for housing the motor,
The inverter is an electric oil pump including an electronic board,
The inverter includes a cover portion that accommodates the electronic board and covers a motor in the housing,
The cover portion includes an opening facing the electronic substrate housed in the cover portion, and a closing member closing the opening in a bottom portion,
Electric oil pump. The electronic board includes a through hole for soldering,
The cover portion includes a lead penetrating the through hole,
The lead is soldered to the through hole,
The opening faces the lead on a surface facing the bottom of both surfaces of the electronic substrate,
The electric oil pump according to claim 1. The cover portion includes a connector for receiving power,
The lead is a lead of the connector,
The electric oil pump according to claim 2. The housing includes a female screw and a housing-side terminal that overlaps the female screw in the thickness direction of the electronic board,
The electronic board includes a board-side terminal that is superposed in the thickness direction with respect to the housing-side terminal, and a through hole having a diameter larger than a head of a male screw screwed into the female screw,
The through-hole faces the female screw, the housing-side terminal, and the board-side terminal that overlap each other,
The opening faces the through hole,
The electric oil pump according to claim 1. Each of the housing-side terminal and the female screw is provided in the housing and is electrically connected to the U-phase, V-phase, and W-phase of a three-phase power source, respectively.
The board-side terminals are provided on the electronic board, and are electrically connected to the U-phase, the V-phase, and the W-phase, respectively.
Three through holes are provided in the electronic board and individually face the three board-side terminals,
The electric oil pump according to claim 4. Each of the cover portion and the closing member is made of resin,
The closing member is adhered or welded to the bottom portion of the cover portion,
The electric oil pump according to any one of claims 1 to 5. The closing member is made of a resin having higher light transmittance than the bottom portion, and is welded to the bottom portion.
The electric oil pump according to claim 6.

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